Over the last 20 years, employment opportunities in the Milwaukee region have abandoned the city center and relocated to surrounding counties and suburbs. This trend has created problems of poverty, urban sprawl, housing inadequacies, and a strain on the transportation infrastructure. Nathaniel Gieryn, a student at the University of Wisconsin-Madison, discussed the problem and used a map to show job market trends in Milwaukee and surrounding counties. Nathaniel recommended concentrating sustainable development efforts on depleted areas of downtown Milwaukee to bring new jobs to the area and reverse recent employment trends. He also noted that environmentally damaged Brownfield sites are prime targets for development because of their central geographic location.